KR101200900B1 - High-tensile coupling - Google Patents

Abstract

The present invention relates to a high-strength coupling, more specifically, a coupling connecting a transfer pipe for transferring fluid at low pressure, such as a sewage pipe, to each other, a coupling table having a plurality of grooves formed at both ends of a casing having a "C" cross section. And the coupling rods are arranged to cross each other, and then each inner receiving portion of the coupling rod inserts a nut rod, and a high tension is formed in a casing portion contacting the transfer tube by opening a gap between the two nut rods with a fastening bolt. The present invention relates to a high-strength coupling that can improve the watertightness of the connection part as well as prevent the watertightness deterioration due to the bolt loosening due to the impact by canceling the shock transmitted to the fastening device from the outside at the cross-coupled table.

Description

High Tensile Coupling {HIGH-TENSILE COUPLING}

The present invention relates to a high-strength coupling, more specifically, a coupling connecting a transfer pipe for transferring fluid at low pressure, such as a sewage pipe, to each other, a coupling table having a plurality of grooves formed at both ends of a casing having a "C" cross section. And the coupling rods are arranged to cross each other, and then each inner receiving portion of the coupling rod inserts a nut rod, and a high tension is formed in a casing portion contacting the transfer tube by opening a gap between the two nut rods with a fastening bolt. The present invention relates to a high-strength coupling that can improve the watertightness of the connection part as well as prevent the watertightness deterioration due to the bolt loosening due to the impact by canceling the shock transmitted to the fastening device from the outside at the cross-coupled table.

In general, a coupler is attached to a joint of a transfer pipe that transfers a fluid to prevent leakage to the joint. When the coupler is mounted on a pipe for transporting high pressure fluid, an anti-separation means is further added to prevent the transport pipe from being separated from the coupler at high pressure. However, the pipe for transporting most low pressure fluids such as sewage pipes does not have a separation prevention means. Watertightness is achieved only by simple clamping force.

Representative couplers are provided with a pair of semi-circular U-shaped pipes, and flanges protrude in the tube axis direction at the end of each pipe to be in contact with each other at the joints of the pipes. have.

Bolting using the flange is bolted in the direction in which the two flanges in close contact. This fastening is one side of the bolt head and the nut is in contact with the flange acts as a resistance when tightening by rotation requires more additional tightening force. If the bolt is tightened in this way, a strong fastening force is partially transmitted to the flange contacting the bolt or nut, which may result in a breakage of the flange. If the flange is partially broken, the bolt fastening force may be lowered, which may cause leakage due to the bolt loosening. .

In addition, in addition to the above reasons, the ground pipe and ground due to various excavation work or natural phenomena may cause the transfer pipe to be bent vertically and horizontally, and bolt loosening may also occur due to the transfer vibration of the fluid being transferred into the transfer pipe. The generated bending and vibration is transmitted to the fastening bolts to fasten the coupling through the transfer pipe to release the fastening bolts may cause a leak due to the lowering of the fastening force.

In particular, in the case of sewage pipes, various wastewaters are transported, so if a leak occurs, it causes an environmental problem that pollutes the neighboring soil. Therefore, a development of a coupling that can provide a stronger clamping force is required to prevent this.

The high tension coupling according to the present invention,

A plurality of grooves are formed at both ends of the casing having a C-shaped cross section, and the coupling bars are arranged to intersect with each other, and then a nut rod is inserted into each inner receiving portion of the coupling bar, and the gap between the two nut rods is fastened with a fastening bolt. The connection of the conveying pipes by opening them together, removing the friction with the members when tightening the bolts to facilitate the tightening operation, and the vibration or impact load transmitted to the coupling part of the coupling is a part of the coupling table which is partially installed with each other. In order to provide a device that can prevent the bolt loosening by minimizing the impact load transmitted to the fastening bolt by offsetting.

The high tension coupling of the present invention for solving the above problems,

A coupling for connecting a transfer pipe for transporting fluid at low pressure, such as a sewage pipe and rainwater pipe, the coupling comprising: a casing for connecting the two transfer pipes in an axial direction with a pipe having a C-shaped cross section; A sleeve configured to pressurize and seal an outer circumferential surface of the transfer pipe inserted and placed inside the casing; First and second joining bands formed at each end of the side opening of the casing to have accommodation portions in an axial direction and intersect with each other; It comprises a; fastening means for reducing the casing diameter by opening the interval between the first and second coupler crossing to make the fastening.

As described in detail above, the high tension coupling of the present invention,

A plurality of grooves are formed at both ends of the casing having a C-shaped cross section, and the coupling bars are arranged to intersect with each other, and then a nut rod is inserted into each inner receiving portion of the coupling bar, and the gap between the two nut rods is fastened with a fastening bolt. It is possible to prevent the member damage due to excessive tightening to a specific part by opening the connection of the transfer pipe to each other. In addition, there is an effect to prevent the water-tightness is deteriorated by loosening or breakage of the bolts by partially offsetting the vibration and impact load transmitted to the fastening bolt and the nut rod which is the fastening means crossed.

1 is a perspective view of a high tension coupling according to the present invention;
2 is a cross-sectional view and a partial portion AA of FIG.
Figure 3 is a schematic separation view showing the fastening means of the high tension coupling of the present invention.
4 is a cross-sectional view showing a coupling stage of the present invention.
5 is a plan view showing a coupling state of the coupling according to the present invention.
6a to 6c is a perspective view and a cross-sectional view showing an embodiment of a second nut rod according to the present invention.

Hereinafter, the present invention will be described in detail with the accompanying drawings.

1 is a perspective view of a high tension coupling according to the present invention, FIG. 2 is a cross-sectional view and a partially enlarged view of the portion A-A of FIG. 1, and FIG. 3 is a schematic separation view showing the fastening means of the high tension coupling of the present invention.

As shown, the high-strength coupling 10 according to the present invention is a coupling connecting the transfer pipe 60 for transferring the fluid at low pressure, such as sewage pipes and rain pipes.

The coupling is provided with a casing 20 for injecting and connecting two different transfer tubes, and a sleeve 30 to pressurize the outer circumferential surface of the transfer tube inserted and inserted into the casing.

The casing 20 is a tube having a C-shaped cross section at both ends in the axial direction to fold a portion in the center direction to prevent the sleeve seated therein. In addition, the sleeve is preferably formed of a rubber material excellent in elasticity and watertightness, it is possible to improve the gripping force and the watertightness of the conveying pipe is inserted into a plurality of projections, preferably annular bands on the inner surface.

The casing 20 is formed with first and second coupling bands 41 and 42. The first and second joining bands are formed at both ends of the opening of the casing side having the C-shaped cross section, respectively. As shown in FIG. 4, the coupling rod is rolled around the casing end side in a circular manner so that the end portion is attached to the casing outer surface so that the receiving portion 43 is formed therein.

"의 형태로 형성하고, 상기 제2결합대(42)는 축과 직교되는 방향으로 양측에는 한쌍의 측면돌기(421)가 돌출되고, 내측에는 한쌍의 중앙돌기(422)가 돌출된 "

"의 형태로 형성한다. In addition, the first coupler 41 has a pair of inner projections 411 protruding in a direction perpendicular to the axis "

", And the second coupler 42 has a pair of side projections 421 protrude on both sides in a direction orthogonal to an axis, and a pair of central protrusions 422 protrude on the inner side.

Form in the form of ".

That is, the receiving portion 43 is formed in the protruding portion on the inner protrusion 411 of the first coupling table 41, the side protrusion 421 and the central projection 422 of the second coupling table 42, The protruding protrusions intersect each other.

As such, when the intersection between the couplings is made, the inner surface of the pair of inner protrusions 411 of the first coupling member is brought into contact with the outer surface of the pair of central protrusions 422 of the second coupling member so that both ends of the casing side surface are engaged with each other to be integrated. have. Such integration can prevent the vibration and impact loads generated in the casing axial direction from being concentrated on the fastening means, thereby preventing the fastening means or the casing from being damaged.

Therefore, the protruding inner protrusions 411, the side protrusions 421, and the central protrusions 422 may be provided in addition to the illustrated form to increase the number of times crossing each other, thereby providing more firm coupling force.

Next, the fastening means 50 is further provided to fasten or cross the first coupling table 41 and the second coupling table 42 to reduce or enlarge the diameter of the casing 20.

The fastening means includes a second nut rod 52 inserted into the receiving portion of the first coupling stand 41, a first nut rod 51 inserted into the receiving portion of the second coupling rod 42, and the first nut rod 51 inserted into the receiving portion of the second coupling rod 42. It consists of a fastening bolt 53 is inserted into the second nut bar by inserting the first nut bar.

The first nut rod 51 is axially inserted into the inner accommodating portion of the second coupling rod, and the second nut rod 52 is axially inserted into the inner accommodating portion of the first coupling rod. In addition, a plurality of tightening holes 511 are formed in the first nut rod 51 in a direction orthogonal to an axis, and a screw thread is formed on the inner surface of the first nut rod 51 so that the fastening bolts 53 are screwed together.

The second nut rod 52 has a support groove 521 formed at a position corresponding to the tightening hole 511 of the first nut rod. The support groove is formed in a direction orthogonal to the axis of the second nut rod.

The fastening bolts 53 are installed on the first nut rods 51 having the tightening holes and the second nut rods 52 having the support grooves formed therein. The fastening bolt 53 is inserted into the screw fastening hole 511 of the first nut rod, the end is inserted into the support groove 521 of the second nut rod, the first by the rotation of the fastening bolt 53 The nut rod 51 is moved to one side or the other side, and the position is fixed while turning in the support groove of the second nut rod.

Preferably, the fastening bolts 53 are coupled to at least two, and the fastening positions when using three fastening bolts are fastened at equal intervals as shown in FIGS. 3 and 5.

The upper and lower fastening bolts 53 of the illustrated drawing are coupled to the first nut rod through the space between the inner protrusion 411 of the first coupling rod and the side protrusion 421 of the second coupling rod to be partially inserted into the second nut rod. The central fastening bolt shown is a part of the central groove 412 between the two bolts 423 between the two central projections 422 of the second coupling member and the two inner protrusions 411 of the first coupling member. Make sure the fastening is done.

That is, the shock load or vibration that the inner side of the first coupler two inner projections 411 and the outer surface of the second coupler center projection 422 intersect each other while the fastening bolts are coupled to each other in contact with each other and proceed in the axial direction. By absorbing to minimize the load transmitted to the fastening bolt.

As described above, the coupling 10 of the present invention crosses the ends of the casing 20 in which the coupling bars 41 and 42 are formed, and the crossed ends are configured to achieve watertightness of the transfer pipe connecting by pushing the gaps apart from each other. . That is, the fastening of the coupling is to closely connect the two transfer pipes by the tension generated by pulling each other at the casing end.

In addition, it is possible to prevent the bolt loosening due to repeated vibration by minimizing the load and vibration transmitted to the fastening bolt (53).

Then, the installed casing 20 is going to be opened in the outward direction, the opening is to act in the direction of compressing the fastening bolt 53 in the cross-coupled coupling (41, 42). However, since the fastening bolt and the nut rod are formed of a metal material having high strength, the fastening bolt and the nut rod can be prevented from being damaged, and thus, the fastening bolt and the nut rod can be used without repair for a long time.

As shown in FIGS. 3, 6A and 6B, the second nut rod 52 of the present invention includes an inner protrusion 411 of the first coupler 41 of both side surfaces and the rear surface except the support groove 521 on the front surface. The outer surface of the contact portion may be formed with a coupling surface fixed surface 522 processed in a plane, respectively.

For example, the second nut rod 52 is inserted into the inner protrusion 411 of the first coupler, and the fastening bolt 53 is fastened when the second nut rod is rotated or moved up and down in the inner protrusion during the fastening process. The end of is not matched with the support groove 521 of the second nut rod, the fastening force is lowered as the fastening bolt shaft is shifted from the support groove shaft.

Accordingly, an outer surface portion of the second nut rod 52 contacting the inner protrusion 411 of the first coupling unit is formed as a coupling unit fixing surface 522 that is a flat recess, and thus the inner protrusion 411 is formed on the coupling unit fixing surface 522. Since the inner projections of the first coupler are supported by the coupler fixed surface jaws, the inner projections of the first coupler can be prevented from being spaced apart in the vertical direction in the axial direction of the second nut rod.

In addition, the second nut rod 52 angled by the coupling bar fixed surface has a cross section similar to a rectangular cross section in which three surfaces are flat and only one side is curved. The inner protrusion 411 is in contact with the second nut rod is formed in a curved surface, the coupling is made by point contact rather than surface contact when the two members are combined. That is, the coupling groove fixing surface 522, which is a flat groove, is formed on three surfaces of the second nut rod, so that the two contacts between the left and right coupling surface fixed surfaces and the rear coupling coupling surface are formed, and the left and right coupling surface fixing surfaces and the support grooves are formed. It is in contact with the inner projection through at least three of the four contact points of the edge contact 523, such as two contacts between the front.

Coupling by the three contacts 523 concentrates the tightening force when tightening by the fastening bolt 53, thereby providing a strong fastening force as well as structural stability, so that the second nut rod 52 rotates about its axis. It is possible to prevent the shaft of the fastening bolt is to be matched without being spaced apart from the shaft of the support groove.

In addition, as shown in FIG. 6c, the inner protrusion 411 holding the portion of the coupling stand fixing surface 522 of the second nut rod is folded in multiple stages so that the cross section of the inner protrusion is formed in a "-" shape. The inner surface of the plane formed by the folding may be in contact with the coupling-fixed surface 522 of the second nut rod to provide structurally stable gripping force such as preventing the second nut rod from rotating.

At this time, all three surfaces of the inner protrusions may be brought into contact with the two surfaces by causing a certain amount of play to occur without contacting all the surfaces of the coupling bar fixing surface 522 of the second nut rod. This is to facilitate the insertion of the second nut rod 52 into the inner protrusion 411.

Hereinafter, the state of use of the high tension coupling according to the present invention will be described briefly.

First, two feed pipes 60 are introduced into both axial ends of the coupling 10.

After the feed pipe is introduced, the ends of the casing 20 intersected are fastened. That is, when the fastening bolt 53 mounted on the crossed casing end is rotated, the fastening bolt is rotated while the end is supported by the support groove 521 of the second nut rod. Therefore, the first nut rod 51 inserted into the coupling bolt while being screwed is moved along the outer surface of the fastening bolt in the axial direction of the fastening bolt, and thus between the first nut rod 51 and the second nut rod 52. Make a gap.

When the gap between the first nut rod and the second nut rod is extended, the ends of the casing crossing each other are pulled outwards from each other, so that the inner portion contacting the transfer pipe is formed with a high tensile force, and a sleeve installed inside the casing 20. 30 is in close contact with the transfer pipe 60 is made of watertight.

In addition, when the fastening bolt 53 is rotated in the opposite direction, the first nut rod 51 moves and the second nut rod 52 moves closer to the second nut rod 52, thereby removing the tension pulling the casing end that is crossed outwardly and contacting the transfer pipe. The diameter of the tube is enlarged to allow the removal of the transfer pipe.

10: coupling
20: casing
30: sleeve
41: first coupling band 42: second coupling band
43: receiving portion 411: inner projection
412: center groove 421: side projection
422: center projection 423: bolt fastening groove
50: fastening means 51: first nut rod
52: second nut rod 53: fastening bolt
511: tightening hole 521: support groove
522: fixed surface fixed surface 523: contact
60: transfer pipe

Claims (4)

A casing 20 for connecting the two transfer pipes 60 in the axial direction with a tube having a C-shaped cross section; A sleeve 30 for pressurizing and sealing an outer circumferential surface of the transfer pipe inserted and placed inside the casing; First and second coupling bands 41 and 42 formed to have receiving portions 43 in the axial direction at each end of the side opening of the casing and intersect with each other; Tightening hole having a screw thread in the axial direction and inserted in the inner receiving portion of the second coupler 42 to reduce the casing diameter by the gap between the first and second coupler cross to achieve the fastening ( The first nut rod 51 formed with a plurality of 511 and the second nut rod inserted into the inner receiving portion of the first coupling table 41 in the axial direction and the support nut 521 formed in the direction perpendicular to the shaft are formed. 52) and screwed so as to be inserted into the first nut rod tightening hole 511 and inserting an end portion into the support groove 521 of the second nut rod to tighten the first nut rod from the second nut rod. In the coupling for connecting the transfer pipe for transporting the fluid at a low pressure comprising a; fastening means 50 consisting of a fastening bolt 53 to be adjusted,
The first and second coupler (41, 42) is to roll the casing end in a circular shape so that the receiving portion is formed therein,
The first coupler 41 has a pair of inner protrusions 411 protruding in a direction perpendicular to the axis.

", And the second coupler 42 has a pair of side projections 421 protrude on both sides in a direction orthogonal to an axis, and a pair of central protrusions 422 protrude on the inner side.

", And the protruding protrusions of the first coupling unit and the second coupling unit to intersect with each other, but the inner surface of the pair of inner projections of the first coupler is in contact with the outer surface of the pair of central projections of the second coupler ,
The fastening bolt 53 is between the inner projection 411 formed on both sides of the first coupling table 41 and the side projections 421 formed on both sides of the second coupling table 42, and the central groove of the first coupling table ( 412 through the bolt coupling groove 423 of the second coupler through the first nut rod 51 to be coupled to the second nut rod 52,
The second nut rod 52 is formed on the outer surface of the side contacting the inner projection 411 of the first coupling of the two sides and the back surface except for the support groove 521 of the front surface is formed in the coupling surface fixed surface 522, respectively The inner protrusion 411 is a high-tension couple, characterized in that by folding the inner surface in a multi-stage, each of the folded surface is interviewed with the engaging surface fixed surface formed on the third surface of the second nut rod to prevent the rotation of the second nut rod ring. delete delete delete

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